A high school in California has done away with mirrors in its girls’ bathroom and substituted signs of affirmation.

Laguna Hills High School students look at signs that say things like, “You are beautiful” and “You are enough,” instead of looking at their own reflections.

It was the idea of Sabrina Astle, 17, who told ABC News she, “wanted to find a way to make a difference through our Kindness Club on campus. This is why I started making the posters in the first place.”